EINVAL undeclared on MINGW

[tresf]

Reading rpmalloc.c it appears as though EINVAL is never defined properly for MINGW environments. I think this is provided by <errno.h> but this seems to be disabled for Win32 builds.

The build log is available here.

[mjansson]

Try the latest develop branch, moved the errno.h include to always include (it was not needed for msvc compilation, which is why it was not included in windows builds before).

[mjansson]

Btw, in your LMMS PR LMMS/lmms#3873 you probably mistyped the thread finalization in MemoryManager::ThreadGuard::~ThreadGuard(), see my comment in your PR

[mjansson]

If it fixes your build I'll do tests and then a merge to master and a 1.2.1 release to make it easier for you to use as a submodule.

[mjansson]

I see the build completed now, but I'll leave this issue open for now until it is merged to master.

[mjansson]

Merged to master, closing